Limited 30 Day warranty from Onlinecarstereo.com implies that repairs must be returned to Onlinecarstereo.com, not the manufacturer. More information can be found in our help section under returns & warranties.

Bought a set of these and installed them behind the seats of a Honda S2000. It made a huge difference even without an amplifier, Next upgrade will be to add in a 400-4 amp to power these and the speakers in the doors.